Workers at a Webasto Roof Systems plant in suburban Detroit voted 99 to 79 to join the UAW Thursday. The plant produces convertible tops for the Ford Mustang, Ford Bronco, Jeep and Chevrolet Corvette.
Pay and schedule changes motivated workers to organize, employees said in a statement. The organizing drive began in November 2022.
Webasto announced plans for the plant west of Detroit in Plymouth, Mich., in 2019 after scoring new contracts with Ford Motor Co. and Stellantis.
The plant is just north of Van Buren, Mich., where 160 UAW members at a Constellium aluminum components plant began striking Wednesday over safety issues and pay.
Further south, UAW members at a Clarios battery plant in suburban Toledo began striking May 8.
Negotiations are ongoing at both plants.
Webasto, of Stockdorf, Germany, ranks No. 49 on Automotive News' list of the top 100 global parts suppliers, with estimated worldwide sales to automakers of $4.38 billion in its 2021 fiscal year.